Investigating the Effect of Tightening Torque on Crossing Resistance of Screw Couplings

Keywords

Screw couplings, tightening torque, lightning protection
system

Abstract

In a previous work a feasible test to be carried out during
the production stage of electrical screw couplings of
lightning protection systems was proposed using the
evaluation current, which corresponds to the nominal
current of the electrical contacts. This test with the proper
mass and crossing resistance aimed to increase the
reliability of couplings. In this work an investigation
regarding the affection of tightening torque to the crossing
resistance of couplings and the temperature rise in them
under the evaluation current is attempted.